Finding the Fourth Proportional to 99,479.91, 137,280.91 and 54,158.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,479.91 : 137,280.91 = 54,158.28 : x
2. Step 2: Convert to fraction form
   99,479.91/137,280.91 = 54,158.28/x
3. Step 3: Cross multiply
   99,479.91x = 137,280.91 × 54,158.28
4. Step 4: Simplify right side
   99,479.91x = 7,434,897,962.43
5. Step 5: Solve for x
   x = 7,434,897,962.43/99,479.91
6. Step 6: Final answer
   x = 74,737.68